Normal Operation
WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
The Parking Aid Module (PAM) supplies a reference voltage and signal return to the active park assist sensors. A fault condition occurs when the PAM detects a short to voltage on the active park assist sensor signal circuit.
- DTC B129C:12 (Left Front Side Sensor: Circuit Short To Battery) - continuous and on-demand DTC that sets when the left active park assist sensor signal line is shorted to battery voltage.
- DTC B129D:12 (Right Front Side Sensor: Circuit Short To Battery) - continuous and on-demand DTC that sets when the right active park assist sensor signal circuit is shorted to battery voltage.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Active park assist sensor(s)
- PAM